I think that's a good idea. I bought my original Ipad one the week it came out and bought wifi only because our Palm phone had free hot spot at that time thru Verizon. I hated using it with hot spot. i bought the Ipad three with wifi/cell and do the month to month directly on the Ipad where i can start, stop, adjust if i need more. I use a data usage app to keep up with it and have only added more service one time on vacation (actually it just moved up the date for renewal a couple of days). I have the same on my Air and wouldn't have an Ipad without even though i recently bought an iPhone 5S. I use them fairly differently and having the cell on the Ipad is wonderful when traveling. GPS on maps and other apps is perfect also and you need cell for this to work.
I have read that if you keep the cell service on continuously it uses more battery because it is constantly searching for service--don't know if this is true or not but doesn't hurt since turning on or off is quick. Consequently I turn OFF cell service when I'm home and the iPad is on wifi. YMMV.
I have read that if you keep the cell service on continuously it uses more battery because it is constantly searching for service--don't know if this is true or not but doesn't hurt since turning on or off is quick. Consequently I turn OFF cell service when I'm home and the iPad is on wifi. YMMV.